Hi Ben,
complete representation of your map (the one in CCP4 formatted file) is
a reciprocal space box of reflections with miller indices being
|h| Hi All, I am currently trying to filter a CCP4-formatted real space map from
the EMDB, which is at 3.2 Å resolution, to different resolutions from
3.2 to 5 Å, and I've been having a bit of a difficult time getting it
to work. My first thought was to do an fft to get structure factors, then
regenerate the map from those structure factors with a resolution
cutoff. To do this, I used the tools "phenix.map_to_structure_factors"
and "phenix.mtz2map" to generate a structure factor file, then convert
it back into a map. When I do this, I end up with a very noisy map
that is not usable for what I would like to do. Is there a better way to accomplish this in phenix (or another tool)?
I've also tried some low-pass filtering with proc3d, without much
success... Thanks,
Ben Barad
Fraser Lab @ UCSF